Ash-sifter.



. M T w m 6 V r V. a M d .w n e a P Y B m w N Du TEN STW UFS m um H M m m f a E 4 w B 5 9 u N m w n m WA 0 0. N m w ATTORNEY.

m: NORRIS PETERS cc. Fume-mam msumsmm n. c.

UNITED STATES PATENT OFFICE.

HENRY AUSTIN, 0F BELLOWS FALLS, VERMONT.

ASH-SIFTER.

SPECIFZCATION forming part of Letters Patent No. 699,134, dated May 6, 1902.

Application filed SeptemberlG, 1901- Serial No. 75,444. (No model.)

To aZZ whom, it ntay concern:

Be it known that LHENRY M. AUSTIN, a citizen of the United States of America, residing and havingpostoffice address at Bellows Falls, in the county of Windham and State of Vermont, have invented certain new and useful Improvements in Ash-Sifters, of which the followingis a description, reference being had to the accompanying drawings,'where- Figure l is a perspective View showing the rear and other parts of an ash-Sifter embodying said improvements. Fig. 2 is a perspective View showing the front and other parts of said ash-sitter. Fig. 3 is a View of what is shown in Figs. 1 and2 in central'vertical section. Fig. lis adetail side view,on an enlarged scale, of the doors to the inlet-opening and of the parts which automatically operate the same. Fig. 5 is a view of the secondary screen. Fig. 6 is a view of the primary screen.

The object of the improvement is the'production of a device useful for sifting or screen-' ing burned coal, separating the coal and the cinders from the ashes in the operation. It may also be used for any cognate purposes.

In the accompanying drawings the letter A denotes the-main box or casing; B, a hinged lid; 0, a vertical sliding door closing the outlet-opening; E, an inlet-opening; F and G, two swing doors to the inlet-opening.

The letter H denotes the slanting primary screen, the letter I denotes the slanting shelf under the primary. screen, and the letter denotes the secondary screen, which leads to and out of the outlet-opening D. v

The letter L denotesa crank-arm practically rigid with the door]? in the rotary movement of the two. The letter M denotes asimilar crank-arm practically rigid with the door G in the rotary movement of the two.

The letter N denotes a link from the arm L to the lever P. The letter 0 denotes a similar link from the arm M to the lever P. The

lever P is pivoted to the inside of the casing at about its center.

The letter W denotes a Weight which operates to automatically close the two doors F and Gthrough the medium of the chain, (running over the pulley S,) the lever P, thelinks N O, and the crank-arms L M.

' When the unsifted stuff is dumped into the inlet-opening E, it falls upon thedoors F and G, which open to permit the passage of the stufi and are then closedautomatically by the weight W and the intermediates just mentioned. This automatic closing of the doors F and G prevents the dust incident to the screening process from escaping out of the easingA to the annoyance and hurtof the person using the device. The unsifted stuff falls upon the primaryslanting screen H. A good portion of the ash sifts through they same, while the unsifted part passes onto the secondary slanting screen K. At the same time the ash which has passed through the screen H falls upon the slanting shelf I,which underlies the primary screen, and falls therefrom upon the secondary screen K, passing through the same into the space at the bottom of the casing. The unsifted stufi which falls upon the secondary screen K from the primary screen H passes downward along that secondary screen. Practically all the remaining ash thereof sifts through the secondary screen into the open space in the lower part of the casing. Finally, if the door C be open the coal and cinders pass out at the outlet D.

I claim as my improvement In combination,1 the casing having inlet opening, thedouble hinged doors to said inlet-opening, the single weight for automatic ally'closing both doors, and the intermediate chain, lever, links and crank-arms, all substantially as described and fo'rfthe purposes Witnesses:

KITTREDGE HAsKINs, K. G. DUNLEVY. 

